NIE Numbers, Notaries & Notarial Deeds: Everything You Need to Know Before You Buy

Ask anyone who has bought a property in Spain what surprised them most about the process, and the same themes tend to emerge. Not the complexity — Spain’s property purchase system is, in fact, well-structured and legally robust. What surprises buyers most is the unfamiliarity: a cast of legal characters and procedural steps that simply do not exist in the same form in the UK, Ireland or Northern Europe.

Three elements in particular tend to generate the most questions: the NIE number, the role of the Notario, and the Notarial Deed (Escritura). Understanding each of them clearly — what they are, why they exist, and what they mean for you as a buyer — will make the entire process feel considerably less foreign and considerably more manageable.

This article addresses all three in depth, so that when the moment comes, you are not encountering them for the first time.

The NIE Number: Your Gateway to Everything

The NIE — Número de Identificación de Extranjero, or Foreigner’s Identification Number — is a unique tax identification number issued by the Spanish government to any non-Spanish national who needs to conduct legal or financial activity in Spain. It is, in the most practical sense, the key that unlocks everything else in the purchase process.

Without a NIE, you cannot sign a purchase contract. You cannot open a Spanish bank account. You cannot register a property in your name. You cannot, in short, buy a property in Spain. This is why obtaining your NIE is the very first practical step, and why we always advise buyers to begin the process as early as possible — ideally before they have even identified a specific property.

How to Obtain Your NIE

There are two routes to obtaining a NIE. The first is to apply in person at a Spanish consulate in your country of residence. This is typically the most convenient option for buyers who have not yet made the move to Spain. You will need to complete the application form (Modelo EX-15), provide your original passport and a photocopy, a completed Modelo 790 fee form, and documentation demonstrating the reason for your application — in the case of a property purchase, a letter from your lawyer or estate agent confirming your intention to buy.

The second route is to apply in person at a National Police station (Comisaría) in Spain, specifically at the Foreigners’ Department (Oficina de Extranjería). This route is viable if you are in Spain at the time of application and can take less time than applying from abroad.

The third — and for many international buyers the most practical — option is to appoint a lawyer in Spain who can obtain the NIE on your behalf via a Power of Attorney (Poder Notarial). You grant your lawyer limited legal authority to make the application in your name, which removes the requirement for you to be physically present in Spain. This is a well-established, entirely routine process and one your lawyer will have navigated many times before.

The Notario: Impartial Guardian of the Process

The Notario (Notary Public) is one of the most important figures in Spanish property law — and one of the most commonly misunderstood by international buyers. In Spain, notaries are senior legal professionals appointed directly by the Spanish state. They are not private practitioners in the conventional sense: they hold public office, and their role is to act as an impartial guarantor of the legal process, not as an advocate for either party.

The notary’s involvement in a property transaction is mandatory. No sale of real estate in Spain is legally complete without the buyer and seller appearing before a notary to execute the deed of sale. This requirement exists precisely because the notary’s role is protective: they verify the identity of the parties, confirm that the terms of the transaction are lawful and correctly documented, and ensure that both parties understand what they are signing.

What the notary does not do is conduct due diligence on your behalf. They will not check whether the property has outstanding debts, verify planning permissions, or advise you on whether the price is fair. That is the role of your independent lawyer, and it underscores why having your own legal representation — separate from the notary — is so important.

Notaries in Spain are distributed across every town and city. Your lawyer will typically recommend a notary they work with regularly, which is perfectly normal and entirely appropriate. The key point is that the notary’s impartiality is a matter of professional obligation, not personal relationship.

The Escritura: The Document That Makes It Real

The Escritura de Compraventa — literally, the Deed of Purchase and Sale — is the formal notarial document by which ownership of a property legally transfers from seller to buyer in Spain. It is, in the simplest terms, the Spanish equivalent of the completion documents you would sign at a conveyancing solicitor’s office in the UK or Ireland — but executed in a very different setting, with a very different weight.

The escritura is prepared by the notary in advance of the completion appointment. It sets out, in formal legal language, the full terms of the transaction: the identities of the parties, the description of the property and its registration details, the agreed purchase price, confirmation of the method of payment, and any conditions applicable to the transfer.

At the completion meeting, the notary will read the escritura aloud in its entirety — or summarise the key points where the document is lengthy — before both parties sign. If either party does not speak Spanish, an official interpreter must be present or the deed must be provided in a bilingual format. Your lawyer will ensure that this is properly arranged.

After the Escritura: Registration and Taxes

Signing the escritura is the moment of completion, but it is not quite the end of the process. Following completion, your lawyer will present the escritura to the Land Registry (Registro de la Propiedad) for registration in your name. This is a critical step: while the escritura itself constitutes legal proof of ownership, registration at the Land Registry provides public legal protection — formally establishing your title and protecting you against any subsequent claims on the property.

Simultaneously, your lawyer will arrange payment of the applicable purchase taxes. For resale properties in Andalucía, this is Transfer Tax (Impuesto de Transmisiones Patrimoniales) at 7% of the declared purchase price. For new-build properties, the applicable taxes are VAT (IVA) at 10%, plus Stamp Duty (Actos Jurídicos Documentados, or AJD) at 1.2%.

Both registration and tax payment have legally prescribed deadlines, and your lawyer will manage both to ensure you remain fully compliant and your title is protected from day one.

A Note on Powers of Attorney

Many international buyers — particularly those purchasing from abroad and unable to be present in Spain at every stage — choose to grant their lawyer a comprehensive Power of Attorney (Poder Notarial). This is a notarially certified legal authority that allows your lawyer to act on your behalf at key points in the transaction, up to and including the completion itself.

A Power of Attorney does not diminish your control over the transaction. Your lawyer acts strictly within the scope of the authority you grant them, and you remain fully informed and in control at every stage. It is simply a practical tool that removes the requirement for you to be physically present in Spain at each step — a significant convenience for buyers based in the UK, Ireland, Scandinavia or elsewhere in Northern Europe.

The Power of Attorney itself must be executed before a notary — either in Spain, or at a Spanish consulate in your country of residence, or before a local notary with an apostille certification. Your lawyer will advise on the most appropriate route.

The Bigger Picture

Spain’s system of notaries, escrituras and NIE numbers may feel unfamiliar at first, but it is important to recognise that it exists for good reason: to provide legal certainty, to protect both parties in a transaction, and to ensure that property ownership in Spain is properly documented and publicly registered.

Once you understand the architecture of the system — and have the right advisors around you to navigate it — the process is not only manageable but reassuring. You are buying in a mature, well-regulated legal environment with genuine protections in place.

And on the other side of that process is a home on the Costa del Sol. It is, by any measure, worth understanding it properly.

Thinking About Making the Move?

Our team of specialist advisors has been helping international buyers find their perfect home on the Costa del Sol for 15 years. Whether you are at the early stages of research or ready to view, we would love to hear from you.

T: +34 951 177 422   E: info@mosaicrealty.es   W: www.mosaicrealty.es